0. I Grrønlie. Marine avleiringer i bunderlandsdaien. G*} 



Summary of the Contents. 

 On the Marine Deposits in the Dunderlandsdal, 



1. The Upper Marine Boundary and the Oldest 

 Terrace Steps. 



During the time of the deepest submergence of the land 

 after the last ice epoch the upper marine boundary at Bjeld- 

 aanes about 50 km. from Mo lay at least 210 m. higher than 

 now for on that level above the sea small littoral beds are seen 

 at Bjeldaanes and Hjertaas. At Elvebak near Ravnaa not far 

 from the western end of lake Laugvatnet the upper marine 

 boundary lies about 180 m. above the present sea level indi- 

 cating an oblique uplift of the land after the deepest submer- 

 gence (Vogt: Ober die schräge Senkung etc. in nördlichen 

 Norwegen, Norsk geol. tidsskrift 1907). 



In this old shore-line not a few small farms are situated 

 owing to the fact that the marine sediments of sand and gra- 

 vel deposited here were more easily tilled than the bottom-mo- 

 raine above. 



During the sinking and the first period of the rise of the 

 land great masses of stratified sediments had been deposited, 

 and by an uplift of about 40 m. the sea retreated from the 

 inner part of the fjord at Bjeldaanes, partially draining the 

 old bottom-deposits. A sand terrace at Bjeldaanes 168 m. above 

 the present sea level is part of this old sea bottom. By the 

 further sinking o£ the shoreline two lower terrace steps were 

 dug out in these sediments, 165 and 162 m. above the level 

 of the sea. Terraces of the same age are not found elsewhere 

 in this old fjord district, because nowhere else greater masses 

 of older deposita were lifted up above the level of the sea. A 



